Oki MC361 Service & Troubleshooting Manual

Also see for CX2731MFP: Replacement instructions User guide Advance user guide Manual Quick start guide

Oki MC361 Service & Troubleshooting Manual Manual pdf 44 page image

44Unexpected ColorsThe colors produced by the printer are dramatically different from the color expected.Initial Actions to Perform■ Perform Initial Actions from Maintenance Procedures in Chapter 1.■ Verify the media used is supported by this printer.■ Verify the media settings are correct at the Control Panel.■ Print the ID Check Pattern (Setting - Reports – Print – ID Check Pattern) and Demopage (Setting - Reports – System – Demo Page) to see if it is an application problem.■ Perform isolation Test Prints (Section 2.8.3).■ Run the Density Adjustment Test in Section 2.8.5.Areas of the Printer that Apply■ Imaging Unit■ HVPS■ PU BoardTroubleshooting Steps Resolution1. Print the ID Check Pattern / Demo Page and evaluate the colors. Are the colors on the testpages representative of what the customer expects?Yes – Complete, the problem is withthe Customer application.No - Go to Step 2.2. Print a configuration page to check the Imaging Unit life remaining. If the Imaging Unit isreaching its maximum image count, this can reduce print-quality.Yes – replace the Imaging Unit.No - Go to Step 3.3. Print the 100% Solid Fill Test pattern and check for any missing colors. Is the problemwith a single color?Yes –Go to Step 4.No - Go to Step 64. Is there debris or contamination on the LED Head? Yes – Clean with a dry, lint free cloth.No - Go to Step 55. Swap the LED Head of the problem color with any other LED Head. Print a Solid Fill TestPattern. Has the problem moved with the LED Head?Yes – Replace the defective LED HeadNo – Go to Step 66. Swap the Imaging Unit of the problem color with any other Imaging Unit.NOTE: Remove the keys before swapping. Print a Solid Fill Test Pattern to check for defects.Has the problem color moved with the Imaging Unit?Yes – Replace the Imaging UnitNo - Go to Step 7.7. Check for toner contamination on the high voltage contacts. Remove the Imaging Unitsand the Transfer Unit and Is there contamination on the contacts?Yes – Clean the contacts.No - Go to Step 8.8. Are the wiring harnesses on the LED heads undamaged, properly routed and seated? Yes – Go to Step 9.No - reseat the wiring harness.9. Inspect the high-voltage wiring harness. Yes – reseat the wiring harness.No - Replace in the following order:Transfer Unit / LVPS / HVPS / CUPUBoardRepeating Bands, Lines, Marks, or SpotsThis is usually caused by a damaged roller. In some instances, the spots may be darkinstead of white and are repeated.